• synonyms


[strey-tuh s, strat-uh s]
noun, plural stra·ti [strey-tahy, strat-ahy] /ˈstreɪ taɪ, ˈstræt aɪ/.
  1. a cloud of a class characterized by a gray, horizontal layer with a uniform base, found at a lower altitude than altostratus, usually below 8000 feet (2400 meters).
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Origin of stratus

1795–1805; < Latin strātus; see stratum
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for stratus

Historical Examples

  • Here are situated Stratus and Trichonium, which has an excellent soil.

    The Geography of Strabo, Volume II (of 3)


  • As the Cumulus belongs to the day, so does the Stratus to the night.

  • It is of variable extent and thickness, and is called Stratus, a bed or covering.

  • The Stratus, an extended continuous level sheet of cloud, increasing from beneath.

  • The wind lulled, and heavy clouds of stratus appeared in the east, towards evening.

British Dictionary definitions for stratus


noun plural -ti (-taɪ)
  1. a grey layer cloudCompare cirrus (def. 1), cumulus
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Word Origin

C19: via New Latin from Latin: strewn, from sternere to extend
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for stratus


"a low layer of cloud," 1803, from Latin stratus "a spreading," from stratus, past participle of sternere (see stratum).

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Online Etymology Dictionary, © 2010 Douglas Harper

stratus in Science


[strătəs, strātəs]
Plural strati (strătī, strā)
  1. A diffuse, grayish cloud that often produces drizzle and is formed primarily in altitudes no higher than 2,000 m (6,560 ft). A stratus cloud close to the ground or water is called fog. See illustration at cloud.
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The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.